Atomic level structural control and characterisation of perovskite quantum dots

在过去的一年里，我们研究了羧酸对钙钛矿纳米晶性能和性能的影响。具体地说，我们用苹果酸合成了2.5 nm蓝光发射的钙钛矿纳米立方体。我们对它们的性质进行了表征，证明了发射窄而高效，产生了很有前途的蓝色发光二极管。对材料的稳定性进行了评估，并在很宽的电压范围内保持了窄发射。然后我们精确地表征了它们的结构，并确定了精确的团簇组成。我们证明了配体结合仅限于纳米立方体的角落，并且配体手性转移可以导致极化点。我们还研究了表面处理和通过配体置换对其进行修饰。

In the past year, we investigated the effect of carboxylic acid on the performances and properties of perovskite nanocrystals. Specifically, we used Malic Acid to synthesize 2.5 nm blue-emitting perovskite nanocubes. We characterized their properties and demonstrated the emission was narrow and highly efficient, yielding promising blue light-emitting diodes. The stability of the material was evaluated and the narrow emission was maintained over a wide range of voltages. We then precisely characterized their structure and determined a precise cluster composition. We demonstrated ligand binding was limited to the corners of the nanocubes and that ligand chirality transfer could lead to polarized dots. We also investigated surface treatment and their modification via ligand replacement.